Half-step staircase structure



FIG. 1 is a three quarter front, top, left perspective view of a half-step staircase structure showing my new design.

FIG. 2 is a front elevational view thereof, taken in the direction of arrow 2 in FIG. 6;

FIG. 3 is a left side view thereof taken in the direction of arrow 3 in FIG. 6;

FIG. 4 is a right side view taken in the direction of arrow 4 in FIG. 6;

FIG. 5 is a top view taken in the direction of arrow 5 in FIG. 6; and,

FIG. 6 is a view identical to FIG. 1 with directional arrows included.

It is to be understood that bracket in all figure indicates that the precise staircase structure is not claimed. 

The ornamental design for a half-step staircase structure, as shown and described. 